KR100682580B1 - Heat collector and heat-collection system using the same - Google Patents

Abstract

The present invention relates to a simple and low-cost collector and a heat collecting system using the same. The present invention includes a heat collecting portion for receiving an external heat by flowing a working fluid that is a heat transfer medium, and a heat insulating portion filled with a heat insulating gas, and installed to surround the outside of the heat collecting portion to reduce heat loss of the heat collecting portion. It provides a heat collector and a heat collecting system using the same. Therefore, according to the present invention, it is possible to collect solar heat with a simple structure and low cost.

Heat collector, heat insulation part, heat collection part, vinyl resin, heat storage

Description

Heat collector and heat-collection system using the same}

1 is a schematic view showing a conventional heat collecting system

2 is a schematic view showing a heat collecting system according to the present invention

3 is a perspective view showing a first embodiment of a heat collector according to the present invention;

Figure 4 is a perspective view showing a second embodiment of the collector according to the present invention

Figure 5 is a perspective view showing a third embodiment of the collector according to the present invention

Figure 6a is a cross-sectional view when the working fluid is filled in the collecting portion of the collector according to Figure 5

Figure 6b is a cross-sectional view when the working fluid is partially discharged to the heat collecting portion of the heat collector according to Figure 5

7 is a cross-sectional view showing a fourth embodiment of a collector according to the present invention;

8 is a cross-sectional view showing a fifth embodiment of a heat collector according to the present invention;

9 is a schematic view showing one embodiment of a heat storage device according to the present invention

10 is a cross-sectional view taken along line II of FIG. 9.

<Explanation of Signs of Major Parts of Drawings>

  2: collection system 300: collector

305: partition 310: collector

311: heat collecting film 320: heat absorption portion

321: thermal insulation film 330: heat loss prevention unit

331: diaphragm 333: communication unit

350: heat insulating body entrance 500: pump

520: auxiliary heat absorption unit 600: heat storage

610: heat storage tube 620: fixed portion

630: cover

The present invention relates to a heat collector and a heat collecting system, and more particularly, to a heat collector having a simple structure and low cost, and a heat collecting system using the same.

The heat source of the collector and the heat collecting system using the same is not limited, but a solar heat collector using solar heat as a heat source and a heat collecting system using the same are common.

In general, the heat collecting target of the collector is solar heat, but is not limited thereto.

Referring to Figure 1, the configuration of a conventional heat collecting system is as follows.

The conventional heat collecting system 1 includes a heat collector 10 for converting a working fluid flowing through the water supply pipe 11 into a high temperature state, a heat storage 60 for storing a high temperature working fluid, and a working fluid. It comprises a pump 50 to flow from the collector to the heat accumulator.

The configuration of a conventional collector, for example, a flat plate collector, is as follows.

In general, the collector 10 is a device for converting direct sunlight or scattered light of the sun into thermal energy can be said to be the most essential part in configuring a solar heat collecting system. The flat plate collector includes an absorber plate 14 for absorbing solar heat, a copper tube 12 for flowing a working fluid and receiving heat from the absorber plate, a heat insulating material (not shown) for preventing heat loss of the copper tube; It consists of a cover plate 13 surrounding the absorbing plate and the upper portion of the copper tube. Generally, the absorption plate 14 uses a black chromium plated plate, and the cover plate 13 is made of a material that transmits short wavelengths of light but does not transmit long wavelengths.

Referring to the operation of the conventional heat collecting system as follows.

The working fluid, which is a heat transfer medium, flows into the collector along the water supply pipe 11, and the high temperature working fluid obtained through the collector is stored in the heat storage 60. More specifically, in the collector, the working fluid is first supplied to the copper pipe 12 inside the heat collecting plate along the water supply pipe 11 through the water supply port at the bottom of the heat collecting plate, where direct sunlight or scattered light of the sun passes through the cover plate 13. While contacting the heat absorption plate 14 is converted into thermal energy to heat the working fluid in the copper tube (12). Then, the heated working fluid exits through the water outlet pipe 15 on the upper left side of the heat collecting plate. After that, the heat medium is moved by the pump 50 to the heat storage 60 that stores the thermal energy of the working fluid. The heat energy stored in the heat storage 60 is used for heating or hot water as needed.

Meanwhile, natural convection occurs in the copper tube 12 by using a density that decreases as the temperature of the working fluid increases, and both sides of the collector are connected to a heat exchanger (not shown) to form a closed circuit. There is a collection system. In this case, no pump is used.

However, the above-described conventional collector and the collector system using the same have the following problems.

First, the conventional heat collecting system has a problem that the structure is relatively complicated and expensive.

Second, since the shape of the collector is fixed, it is mainly installed in a limited area such as a roof of a building, which has a problem in that the amount of light collection is limited.

Third, after installing the collector in a specific place, there was a problem that it is not free to move to another place.

The present invention is to solve the above problems, an object of the present invention is to provide a collector having a simple structure and low cost and a heat collecting system using the same.

Another object of the present invention is to provide a heat collector and a heat collecting system that can increase the amount of heat collected.

Still another object of the present invention is to provide a collector that is free to move and install.

In order to achieve the above object, the present invention is a heat collecting unit for receiving the external heat by flowing the working fluid which is a heat transfer medium, the inside is filled with a heat insulating gas, is installed to surround the outside of the heat collecting unit heat Provided is a heat collector comprising a heat retaining portion to reduce the loss.

At least one of the heat collecting film constituting the heat collecting portion and the heat insulating film constituting the heat insulating portion preferably transmits sunlight and is flexible. And, at least one of the heat collecting film and the heat insulating film is more preferably made of a vinyl resin. In addition, the collector is more preferably in the form of a double tube.

 According to the second embodiment of the heat collector according to the present invention, the heat insulation portion is provided with at least one diaphragm that divides the heat insulation portion into a plurality of heat insulation chambers. In addition, the diaphragm is preferably provided with a communication unit for moving the insulating gas.

In addition, it is preferable that the warming part further includes a warming gas access part capable of injecting or extracting the warming gas. It is preferable that the said thermal insulation part is cylindrical.

According to a third embodiment of the heat collector according to the present invention, the heat insulation portion includes a heat absorption portion that absorbs sunlight and a heat loss prevention portion that prevents loss of heat absorbed by the heat absorption portion. In addition, it is preferable that a partition wall partitioning the heat absorbing part and the heat loss preventing part is formed in the heat insulating part.

In addition, it is preferable that the heat absorbing part and the heat loss preventing part further include a heat insulating body access part capable of injecting or extracting the heat insulating gas, respectively. In addition, it is more preferable that the upper and lower portions of the heat loss preventing unit are flat. And it is preferable that the upper part of a heat absorption part is round shape.

On the other hand, the collector is preferably at least one or more diaphragms that partition the heat loss prevention portion, and the diaphragm is preferably provided with a communication portion for allowing the insulating gas to move respectively. In addition, the upper portion of the heat collecting film is preferably black.

According to a fourth embodiment of the collector according to the present invention, the diaphragm is provided in the horizontal direction, and the heat loss preventing part is composed of a plurality of horizontal layers. Moreover, it is preferable to provide a communication part in the said diaphragm.

According to a fifth embodiment of the heat collector according to the present invention, the heat insulation portion further includes an auxiliary heat absorption portion located outside the heat absorption portion to prevent heat loss of the heat collection portion.

On the other hand, the heat collecting system using the heat collector is configured to include a heat storage for storing the heat energy of the heat collector and the working fluid discharged from the heat collector. And, the heat collecting system is preferably configured to further include a pump for flowing the working fluid.

According to one embodiment of the heat storage device according to the present invention, at this time, the heat storage device is preferably installed in water. In addition, the heat accumulator includes a heat storage tube made of a material smaller than the specific gravity of water, and a fixing portion for fixing the heat storage tube to be positioned at a predetermined height from the bottom. The heat accumulator preferably further includes a cover part to form a natural heat insulating layer around the heat storage tube.

Therefore, according to the present invention, it is possible to simplify the structure of the collector and the collector system using the same and to reduce the cost.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

Referring to Figure 2, the configuration of the heat collecting system according to the present invention will be described.

The heat collecting system 2 according to the present invention includes a collector 100 for converting a working fluid flowing through a water supply pipe into a high temperature state, a heat accumulator 600 for storing a high temperature working fluid, and a working fluid in the collector. It is configured to include a pump 500 to flow in the heat storage.

The collector 100 is formed of a collector 110 through which a working fluid flows, and a heater 120 filled with a heat insulating gas surrounding the outside of the collector. The working fluid serves to transfer the heat energy absorbed through the solar heat to the regenerator 600, and there is no limitation in the type, but water is generally used. The working fluid may use an antifreeze or a mixture of antifreeze and water in a proportion to prevent freezing in winter.

In addition, the heat accumulator 600 serves to store the thermal energy of the working fluid, it is designed to minimize the heat loss to the outside.

Referring to the operation of the heat collecting system as follows.

A working fluid, which is a heat transfer medium, flows into the collector 100, and the working fluid absorbs solar heat in the collector and changes to a high temperature state. The high temperature working fluid that has undergone the collection process is discharged from the collector 100, and the discharged working fluid is introduced into the heat storage 600 by the pump 500. The heat energy stored in the heat storage 600 is used for heating or hot water as needed.

Referring to Figure 3, when describing the collector according to the present invention.

The collector 100 according to the present invention includes a heat collecting part 110 for receiving external solar energy while a working fluid flows, and a heat insulating part 120 filled with a warming gas and surrounding the heat collecting part. The heat retaining part 120 has a function of reducing the heat energy of the working fluid located inside the heat collecting part 110 to the outside, and there is no limitation on the warming gas filled in the heat retaining part 120. However, as an insulating gas, air which can be obtained economically and easily is preferable.

The heat collecting portion functions to receive external heat and is formed by a heat collecting film. The heat insulating part includes a heat insulating film to fill the heat insulating gas together with the heat collecting film.

At least one of the heat collecting film 111 and the heat insulating film 121 has a property of transmitting a short wavelength and blocking a long wavelength, and preferably has a flexible characteristic. In more detail, at least one of the heat collecting film 111 and the heat insulating film 121 is preferably made of a vinyl resin.

Since vinyl-based resin is inexpensive and easy to process in a predetermined shape, the collector 100 made of the above material is installed in a large area such as a paddy field or a paddy field of a dry season to overcome the low incidence density, which is a characteristic of sunlight, and a large amount of hot water Can be obtained.

The shape of the heat collecting part 110 and the heat insulating part 120 surrounding the heat collecting part through which the working fluid flows can be any. More specifically, the shape of the collector is preferably formed in the form of a double tube in order to facilitate the manufacture of the collector and increase the heat collecting efficiency.

In the case of a double tube collector, the cross-sectional shape of the heat insulating film 121 and the heat collecting film 111 may be any. Although the figure of this embodiment illustrates the case of a circular shape, this invention is not limited to this, The arbitrary polygonal shape or circular shape is possible.

Referring to Figure 4, a second embodiment of the collector according to the present invention will be described.

The basic configuration of this embodiment is the same as that of the first embodiment described above. However, the diaphragm 223 partitioning the heat insulating part 220 into a plurality of spaces is installed inside the heat insulating part 220.

In the absence of the diaphragm 223, the working fluid in the heat collecting portion is bent toward the center of the earth by its own weight, which causes the heat insulating portion 220 to be asymmetrical in the axial direction, and consequently, the heat insulating portion. Thermal insulation of the 220 may be reduced. The diaphragm 223 solves such a problem so that the heat insulating part 220 effectively supports the weight of the fluid flowing in the heat collecting part 210 and maintains the heat insulating effect of the heat insulating part.

In addition, for convenience of movement and storage is provided with a heat insulating body access unit 250 that can inject or extract the heat insulating gas on one side of the heat insulating portion 220, respectively. In order to use the collector, it is possible to fill the warming unit 220 by injecting the warming gas through the warming gas inlet, and extracting the warming gas through the warming body inlet and minimizing the volume to store or move when the heat collector is not used. It can be done easily.

In addition, in order to minimize the number of entry and exit portions of the insulating body and maintain the same pressure in each of the insulating chambers, the diaphragm 223 preferably includes a communication part 225 for allowing the insulating gas to be moved. The shape of the communication portion is not limited, but may be provided by forming holes in the diaphragm at regular intervals.

The shape of the cross section of the thermal insulation film 221 is not limited. However, as shown in Figure 4 it is preferable that the border of the cross section of the insulating portion 220 is circular. In addition, it is preferable that the inner side of the cross section of the heat retaining part 220 is also circular.

Referring to Figure 5, a third embodiment of the collector according to the present invention will be described.

The basic configuration of this embodiment is the same as that of the first embodiment described above. However, the heat retaining portion is mainly composed of a heat absorbing portion 320 that functions to absorb the sun light, and a heat loss preventing portion 330 mainly to prevent the loss of heat absorbed by the heat absorbing portion.

The heat absorbing part 320 positioned above the heat collecting part 310 is placed in a direction in which sunlight is irradiated, and serves to transmit solar heat energy to the heat collecting part 310 by passing the sun light.

On the other hand, the heat loss prevention part 330 located below the heat collecting part 310 serves to support the heat collecting part 310 and reduce heat emitted from the heat collecting part 310 to the outside. In addition, the heat absorbing part 320 and the heat loss preventing part 330 are filled with a heat insulating gas, and are common in that the heat absorbing part 320 serves to insulate the heat of the heat collecting part.

The heat absorbing part 320 and the heat loss preventing part 330 are preferably partitioned into a partition 305 when considering a manufacturing process. In addition, it is advantageous that the material of the partition wall is made of the same material as that of the heat collecting film.

On the other hand, one side of the heat absorbing unit 320 and the heat loss preventing unit 330 is formed with a heat insulating gas access unit 350 for injecting or extracting the heat insulating gas, respectively. In order to use the collector, it is possible to fill the heat absorbing part 320 and the heat loss preventing part 330 by injecting the warming gas through the warming gas inlet and extracting the warming gas through the warming body inlet when the heat collector is not used. By minimizing the volume of the collector. Therefore, it has the advantage of easy storage or movement of the collector.

The heat loss prevention unit 330 may be any shape. More specifically, the lower portion of the heat loss prevention unit 330 is preferably flat. By flattening the lower portion of the heat loss preventing part 330, the collector 300 is stably installed on a flat bottom surface.

In addition, it is preferable that the upper part of the heat loss prevention part 330 is formed evenly so that the working fluid of the heat collecting part 310 is wide and evenly distributed, and the radiation area of the working fluid receiving solar heat is maximized.

On the other hand, in order to ensure that the collector 300 is installed stably, the lower portion of the heat loss prevention unit 330 is preferably configured to be larger than the upper portion of the heat loss prevention unit 330.

The shape of the heat absorbing part 320 is not limited, but the upper part of the heat absorbing part 320 is preferably rounded. This is to prevent heat loss and to absorb solar heat effectively and to prevent snow from accumulating or raining.

In addition, it is preferable that at least one or more diaphragms 331 are installed in the heat loss preventing unit 330. The diaphragm 331 evenly distributes the insulating gas so that the heat loss prevention unit 330 is maintained in a flat shape. Therefore, the heat loss prevention part 330 more easily supports the weight of the working fluid in the heat collecting part 310.

If the insulating gas is filled without the diaphragm 331, the heat loss prevention part 330 also swells in a rounded shape like the heat absorbing part 320, so that the weight of the working fluid is concentrated in the center part, causing a concentrated load. do. In addition, it is advantageous to have a diaphragm 331 to be installed stably on a flat bottom surface.

On the other hand, it is preferable that each of the diaphragm 331 is provided with a communication unit 333 to move the insulating gas. By forming the communicating portion 333 in the diaphragm 331, the trouble of having to individually inject or extract air into a plurality of spaces partitioned by the diaphragm 331 is eliminated, and the diaphragm 331 when the air is injected or extracted This is because a plurality of heat loss preventing chambers partitioned by the same may be filled with the same pressure. The shape of the communication unit 333 is not limited, but may be provided by forming holes in the diaphragm 331 at regular intervals.

The collector 300 may be manufactured by various methods, but a method of injection molding into a cross-sectional shape according to the present invention is preferable. Of course, it is also possible to combine the insulation and the heat collecting unit individually.

Referring to Figure 6a and 6b, the state in which the working fluid is filled in the heat collecting portion of the collector as follows.

The shape of the heat collecting part 310 maintains the shape as shown in FIG. 6A when the working fluid is full, but maintains the shape as shown in FIG. 6B when the working fluid is partially discharged. When the user does not collect the liquid by extracting the working fluid of the collecting unit 310 to the outside, even if the working fluid is frozen by the outside temperature can reduce the amount of freezing.

In addition, this shape of the collector has a merit that the amount of freezing of the working fluid is small, and the frozen working fluid is widely spread so that the frozen working fluid can be easily melted at the beginning of collecting heat.

On the other hand, the user can change the freezing point of the working fluid by maintaining the internal pressure of the heat collecting unit 310 above the atmospheric pressure by adjusting the pressure of the heat absorbing unit 320 and the heat loss preventing unit 330. For example, when the working fluid is water, the freezing point of water can be lowered to 0 ° C or lower.

When the material of the heat collecting film 311 forming the heat collecting part 310 is used as a vinyl resin, the color of the vinyl resin is generally transparent. However, in order to maximize the amount of sunlight passing through the outer heat insulating film 321 to the heat collecting portion 310, the upper portion of the heat collecting film 311 is preferably black. This is the same principle as making the absorbing plate black in order to increase the radiation efficiency in the conventional flat plate collector.

Referring to Figure 7, a fourth embodiment of the collector according to the present invention will be described.

The basic configuration of this embodiment is the same as that of the third embodiment described above. However, a horizontal diaphragm 431 is further provided, and the heat loss preventing part 330 is composed of a plurality of horizontal layers. In addition, the horizontal diaphragm 431 is preferably provided with a communication portion to minimize the number of the heat insulating body access portion and to maintain the same pressure in each insulation chamber. The number of layers of the heat loss preventing part 330 is not limited. 7 illustrates a case where the heat loss prevention part 330 is composed of two layers. On the other hand, the material of the material constituting the diaphragm 431 is preferably a vinyl resin.

Referring to FIG. 8, the fifth embodiment of the collector according to the present invention will be described.

The basic configuration of this embodiment is the same as that of the third embodiment described above. However, the heat insulating part further includes an auxiliary heat absorbing part 520 positioned outside the heat absorbing part 320 to reduce the heat loss of the heat collecting part 310.

At least one auxiliary heat absorption unit 520 is formed to further increase the effect of preventing heat loss of the working fluid. There is no limitation on the number of auxiliary heat absorption units 520. 8 exemplarily illustrates a case where one auxiliary heat absorbing unit 520 is provided.

The auxiliary heat absorbing part 520 is composed of a heat insulating film constituting the heat absorbing part 320 and the outermost heat insulating film 521, the outermost heat insulating film 521 is to transmit short wavelength and block the long wavelength It is desirable to have a flexible characteristic while having the property to. And in more detail, what consists of vinyl resin is suitable.

Referring to Figure 9, one embodiment of a heat storage device according to the present invention will be described.

The heat accumulator 600 includes a heat storage tube 610 and a fixing part 620 for fixing the heat storage tube.

The heat accumulator 600 is preferably installed in the water. Due to the high specific heat of water, the water has a higher temperature than the outside air in winter, and the water can be used cheaply because it is an unused space. In addition, the installation of the heat accumulator in water has a relatively economical advantage since it does not have to be made of a strong structure such as steel pipe or concrete compared to the ground or the ground.

The heat storage tube 610 is preferably made of a material having a specific gravity smaller than that of water so that even if the working fluid is filled. In addition, the heat storage tube 610 should have a high thermal insulation effect to reduce the heat loss.

The fixing part 620 is fixed to one side of the bottom, the other side is made of one or more strings connecting the heat storage tube 610 is floating in the water. The fixing part 620 allows the heat storage tube 610 to be positioned at a predetermined height.

On the other hand, the heat accumulator 600 is provided with a cover portion 630 to prevent the heat loss is increased by the convection action of the working fluid in the water in the heat storage tube 610 in the water. As the heat of the working fluid in the heat storage tube 610 is transferred to the outside of the heat storage tube 610, the temperature of the external water is increased, and the natural convection occurs as the temperature is increased, the cover portion ( 630 reduces the heat loss due to convection of water by forming the convection control space 650.

The cover portion 630 is attached to the upper portion of the heat storage tube 610 as shown in Figure 10 in the form of an angle (angle) having a predetermined angle, but the present invention is not limited thereto. The user may fix the cover part 630 while being spaced apart from the heat storage tube, or change the angle of the cover part 630 appropriately to lower heat loss due to convection of water and attach the cover part 630 to the heat storage tube 610. have. Moreover, the form of a flat cover part is also possible.

The present invention is not limited to the above-described embodiment, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the present invention pertains, and such modifications are within the scope of the present invention.

Referring to the effects of the heat collector and the heat collecting system using the same according to the present invention described above are as follows.

First, a simple and low-cost collector and a heat collecting system using the same can be obtained.

Second, by installing in a large area such as paddy field or paddy field in the farming season, a large amount of hot water can be obtained by overcoming low incident density, which is a characteristic of sunlight.

Third, since the insulating gas can be injected or extracted in the collector, the movable installation of the collector is free.

Claims (22)

A heat collecting portion for receiving external heat by flowing a working fluid which is a heat transfer medium; The collector is filled with a heat insulating gas, the heat collector is provided so as to surround the outside of the heat collecting portion and comprises a heat insulating portion to reduce the heat loss of the heat collecting portion. The method of claim 1, The heat collector is a heat collector, characterized in that the solar light is transmitted and provided with a flexible heat insulating film. The method of claim 1, The heat collecting film for forming the appearance of the heat collecting portion and the heat insulating film for forming the appearance of the insulating portion is a heat collector, characterized in that made of a vinyl resin. The method of claim 1, The collector is a collector, characterized in that the double pipe form. The method according to any one of claims 1 to 3, The heat collector is characterized in that at least one or more diaphragms are divided into a plurality of insulation chamber. The method of claim 5, The diaphragm is provided with a communication unit for allowing the insulating gas to move to the collector. The method of claim 6, The warmer is a heat collector, characterized in that it further comprises a warm-gas inlet and extracting unit that can inject or extract the warming gas. The method of claim 7, wherein The heat collector is characterized in that the cylindrical. The method according to any one of claims 1 to 3, The heat insulating part includes a heat absorbing part provided at an upper part of the heat collecting part to absorb sunlight and a heat loss preventing part provided at a lower part of the collecting part to prevent loss of heat absorbed by the heat absorbing part. Collector made with. The method of claim 9, The heat collector is characterized in that the partition partition partitioning the heat absorbing portion and the heat loss preventing portion is formed. The method of claim 10, The heat absorbing unit and the heat loss preventing unit is a heat collector, characterized in that further comprises a heat insulating gas access unit for injecting or extracting a heat insulating gas, respectively. The method of claim 11, The internal pressure of the collector portion is adjusted by the pressure of the heat absorbing portion and the heat loss preventing portion. The method of claim 12, The upper and the lower portion of the heat loss prevention unit is characterized in that the collector. The method of claim 13, The upper portion of the heat absorbing portion is a heat collector, characterized in that the round shape. The method of claim 14, The heat loss preventing unit is provided with one or more diaphragms for partitioning the heat loss preventing unit, and each of the diaphragm is characterized in that the communication portion is formed so that the insulating gas can be moved. The method of claim 15, The collector is characterized in that the upper portion of the heat collecting membrane is black. The method of claim 9, The heat collecting part further comprises an auxiliary heat absorbing part which is located outside the heat absorbing part to reduce heat loss of the heat collecting part. A collector of any one of claims 1 to 3; And a heat accumulator for storing thermal energy of the working fluid discharged from the heat collector. The method of claim 18, The collection system is characterized in that it further comprises a pump for flowing the working fluid. The method of claim 19, The heat storage system, characterized in that installed in the water. The method of claim 20, The heat storage system is characterized in that it comprises a heat storage tube made of a material less than the specific gravity of the water, and a fixing portion for fixing the heat storage tube to be located at a certain height from the bottom. The method of claim 21, The heat accumulator further comprises a cover portion for suppressing convection by water outside the heat storage tube.

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